CN105794138A

CN105794138A - Carrier aggregation scell selection for lte-a

Info

Publication number: CN105794138A
Application number: CN201480051651.1A
Authority: CN
Inventors: 鲁国强; K.D.曼; L.博斯特伦; E.W.帕森斯; 刘英智; I.比约德; J.博伊尔曼; 刘清朝; D.拉纳维拉; E.马
Original assignee: Telefonaktiebolaget LM Ericsson AB
Current assignee: Telefonaktiebolaget LM Ericsson AB
Priority date: 2013-09-20
Filing date: 2014-09-05
Publication date: 2016-07-20
Anticipated expiration: 2034-09-05
Also published as: EP3624502A1; CN105794138B; EP3047595B1; EP3047595A1; US20170339607A1; JP2016536821A; KR101849027B1; WO2015040521A1; US9756532B2; EP3624502B1; JP6199484B2; KR20160059484A; US9949178B2; US20150087315A1

Abstract

Systems and methods for Secondary Cell (sCell) selection for wireless devices operating according to a carrier aggregation scheme in a cellular communications network are disclosed. In one embodiment, a network node obtains a list of potential sCells for a wireless device. The network node blindly selects an sCell for the wireless device from the list of potential sCells. The network node then configures the wireless device with the selected sCell. Blindly selecting the sCell for the wireless device makes it possible to avoid the use of measurement gaps and reduce throughput loss, according to some embodiments.

Description

Carrier aggregation SCELL for LTE-A selects

Related application

This application requires the temporary patent application No.61/880 of JIUYUE in 2013 submission on the 20th, the U.S. Patent application No.14/251 that on April 11st, 689 and 2014 submits to, the right of 021, and the open of them is fully incorporated in herein by reference.

Technical field

It relates to cellular communications networks, and more precisely, the secondary community relating to the wireless device according to carrier aggregation scheme operation selects.

Background technology

Third generation partner program (3GPP) Long Term Evolution (LTE) senior release 10 (LTERel-10) introduces carrier aggregation as senior LTE feature.Using carrier aggregation, multiple component carriers (CC) can be polymerized, parallel connection share in or from single wireless device transmission.Each component carrier can have any LTE release 8 (LTERel-8) bandwidth: 1.4,3,5,10 or 20 megahertzs (MHz).Can be aggregated to provide the maximum aggregate bandwidth of 100MHz up to 5 component carriers.It addition, each component carrier uses LTERel-8 structure to provide backwards compatibility (that is, each component carrier seems Rel-8 carrier wave).

Fig. 1 illustrates an example of carrier aggregation.In this example, be respectively provided with carrier frequency F0, F1, F2, F3 and F4 community 10-0 to 10-4 can be polymerized.In this example, community 10-0 to 10-4 is transmitted by single base station 12.Relative to concrete wireless device, one of community 10-0 to 10-4 serves as the primary community (pCell) of wireless device, and wherein pCell disposes radio resource control (RRC) connection.The component carrier of pCell is referred to as primary component carrier (PCC).Other community being polymerized with the pCell of wireless device is referred to as the secondary community (sCell) with corresponding secondary component carrier (SCC).All aggregation cell of wireless device are all referred to as the Serving cell of wireless device.

The overlay area of community 10-0 to 10-4 can due to different component carrier frequencies or different due to the power programming on different component carriers.In the example of fig. 1, community 10-0 has maximum coverage area, and serves as the pCell being arranged in the wireless device A of community 10-0, B, C, D and F.Community 10-1 to 10-4 has area coverage less successively, and serves as the sCell of wireless device B to F.In this example, wireless device A does not have sCell to cover, wireless device B has a sCell(and community 10-1) sCell cover, wireless device C has 2 sCell(and community 10-1 and 10-2) sCell cover, wireless device D has 3 sCell(and community 10-1,10-2 and 10-3) sCell cover, and wireless device F has 4 sCell(and community 10-1,10-2,10-3 and 10-4) sCell cover.Therefore, depending on wireless device position in pCell, wireless device can be without sCell and covers, or can have the covering of one or more sCell.

For being connected to the wireless device (such as wireless device A) of pCell on carrier frequency F0, base station 12 starts the frequency interbed 3 (L3) on candidate sCell under normal circumstances and measures, in order to determine whether wireless device has any sCell and cover.Such as, base station 12 starts L3 between frequency under normal circumstances and measures, and such as such as when between the frequency of sCell, L3 measurement triggers the measurement of A4 event when becoming better than threshold value.In LTE specification, when neighbor cell becomes better than threshold value, A4 event occurs, and this threshold value is being herein referred to as A4 threshold value.In the example of fig. 1, by appropriate A4 threshold value, A4 event will trigger for wireless device B on carrier frequency f 1, thereby indicate that wireless device B has and cover via the sCell of community 10-1.By contrast, will trigger on carrier frequency F1, F2, F3 and F4 for wireless device F, A4 event, and thereby indicate that wireless device F has and cover via the sCell of community 10-1,10-2,10-3 and 10-4.Trigger based on measurement event, select for each wireless device and one or more sCell of configuration have sCell covering.

One problem of this normal sCell selection course is, inter-frequency measurements is likely to need to measure gap.Measuring gap is cycle all without business in uplink direction and downlink direction.Use the inter-frequency measurements measuring gap execution sCell selection will cause 7-15% throughput loss (depending on the clearance mode of configuration) on the community of configuration.

Another problem is that of normal sCell selection course, in order to perform any measurement (between frequency or frequency internal clearance or no-interval measurement) on candidate sCell, parameter s-Measure may have to be disabled.As defined in LTE specification, when the Reference Signal Received Power (RSRP) of pCell is measured not when below s-Measure, it is not required that wireless device performs any neighbor cell and measures, and comprises the measurement on candidate sCell, in order to save battery electric power.Thus, in order to the measurement ensured when using normal sCell selection course on candidate sCell is performed by wireless device A, B, C, D and F, s-Measure parameter will have to disabling, and this will cause the wireless device batteries consumption of increase.

In view of discussed above, there are the needs of the system and method selected of the sCell for improving.

Summary of the invention

Disclose the system and method for selecting in a cellular communication network according to the secondary community (sCell) of the wireless device of carrier aggregation scheme operation.In one embodiment, network node obtains the list of the potential sCell of wireless device.Network node is the sCell of blind selection wireless device from the list of potential sCell.Then network node gives the sCell of wireless device selection of configuration.According to some embodiments, the sCell of blind selection wireless device is avoided that use is measured gap and reduces throughput loss.

In one embodiment, blind selection sCell comprises based on circulation (round-robin) strategy selection sCell from the list of potential sCell.It addition, in one embodiment, in the list of potential sCell, the position in the list different from being used for selecting position that the previous ones of the cyclic policy of previous sCell stops starts the cycle over strategy.In another embodiment, in the list of potential sCell, the position in the list after the position being used for selecting the previous ones of the cyclic policy of previous sCell to stop starts the cycle over strategy.In another embodiment, blind selection sCell comprises and selects sCell from the list of potential sCell based on random selection strategy.

In one embodiment, after network node is to the sCell of wireless device selection of configuration, the neighbor cell that network node receives, from wireless device, the sCell selected better indicates than the sCell selected.In response to receiving this instruction, network node configures the neighbor cell sCell as wireless device to wireless device.It addition, in one embodiment, network node cancels the sCell sCell as wireless device of selection of configuration.In one embodiment, described instruction is the instruction of A4 event.In another embodiment, described instruction is the instruction of A6 event.

In one embodiment, after the sCell to wireless device selection of configuration, network node receives, from wireless device, the instruction that the sCell selected is not the acceptable sCell of wireless device.As response, network node is the new sCell of blind selection wireless device from the list of the potential sCell of wireless device.Then network node gives wireless device selection of configuration for the new sCell of wireless device.In one embodiment, network node cancels the sCell sCell as wireless device of selection of configuration.In one embodiment, described instruction is the instruction of A2 event.

In one embodiment, after the sCell to wireless device selection of configuration, network node receives, from wireless device, the instruction that the sCell selected is not the acceptable sCell of wireless device.As response, network node monitors that the neighbor cell of the sCell of the selection from wireless device better indicates than the sCell selected.If the neighbor cell not receiving the sCell of selection within the period of definition better indicates than the sCell selected, then network node new sCell of blind selection wireless device from the list of the potential sCell of wireless device.This blind selection eliminates the potential sCell operated in the frequency identical with the sCell operation frequency selected.Then network node gives wireless device selection of configuration for the new sCell of wireless device.In one embodiment, the sCell from the selection of wireless device is not the instruction of the acceptable sCell of wireless device is the instruction of A2 event, and the neighbor cell of the sCell selected better indicates, than the sCell selected, the instruction being A4 event or A6 event.

In one embodiment, the list of potential sCell is classified by the operation frequency of potential sCell, thus provides the multiple group of frequencies in list.Further, blind selection sCell comprises according to cyclic policy blind selection sCell from a group of frequencies.After the sCell to wireless device selection of configuration, network node receives, from wireless device, the instruction that the sCell selected is not the acceptable sCell of wireless device.As response, network node monitors that the neighbor cell of the sCell of the selection from wireless device better indicates than the sCell selected.If the neighbor cell not receiving the sCell of selection within the period of definition better indicates than the sCell selected, then network node is according to the new sCell selecting wireless device in next group of frequencies from the list of potential sCell of cyclic policy.Then network node gives wireless device selection of configuration for the new sCell of wireless device.

In one embodiment, after the sCell to wireless device selection of configuration, network node monitors at least one instruction from wireless device.At least one instruction can be select sCell be the instruction of acceptable sCell of wireless device, selection sCell be not wireless device acceptable sCell instruction or select sCell neighbor cell than select sCell better indicate.If not receiving at least one instruction, then network node new sCell of blind selection wireless device from the list of the potential sCell of wireless device within the period of definition.Then network node gives wireless device selection of configuration for the new sCell of wireless device.

In one embodiment, it is thus achieved that the list of potential sCell comprises the common factor based on the community and wireless device capabilities that can be used for being configured to sCell and determines list.It addition, in one embodiment, determine the list of potential sCell based on the common factor that can be used for being configured to the cell operation frequency of sCell and wireless device frequency capabilities.

In one embodiment, the list of the potential sCell of wireless device comprises the potential sCell by the order different from the order of the potential sCell of potential sCell the second list including second wireless device.

In one embodiment, network node gave the list weighting of potential sCell before the blind sCell of selection.It addition, in one embodiment, comprised in the list that one or more repeated entries are added to potential sCell to the list weighting of potential sCell before the blind sCell of selection.In another embodiment, comprised the select probability of one or more entries in the list adjusting potential sCell to the list weighting of potential sCell before the blind sCell of selection.

In one embodiment, network node is radio network node.It addition, in one embodiment, wireless network node is base station.

In one embodiment, the network node for configuring sCell to wireless device comprises processor and memorizer.Memorizer contains by the executable instruction of processor.By performing instruction, network node operation is to obtain the list of the potential sCell of wireless device.Network node also operates with the sCell of selection wireless device blind in the list from potential sCell.Network node also operates with the sCell to wireless device selection of configuration.

Those skilled in the art combine appended accompanying drawing read preferred embodiment detailed further below after, it will be recognized that the scope of the present disclosure, and recognize its additional aspect.

Accompanying drawing explanation

It is merged in this description and is formed part thereof of accompanying drawing and illustrate several aspects of the disclosure, and be used for illustrating the principle of the disclosure together with description.

Fig. 1 illustrates an example of carrier aggregation in cellular communications networks；

Fig. 2 illustrates and performs, according to one embodiment wherein base station of the disclosure, the cellular communications networks that the secondary community (sCell) of wireless device selects；

Fig. 3 illustrates according to one embodiment of the disclosure for configuring the operation of the network node of sCell to wireless device；

Fig. 4 illustrates the operation of the network node according to one embodiment of the disclosure, comprises the instruction receiving the neighbor cell about the sCell selected；

Fig. 5 illustrates the operation of the network node according to one embodiment of the disclosure, and comprising the sCell receiving selection is not acceptable instruction；

Fig. 6 illustrates the operation of the network node according to one embodiment of the disclosure, comprises the potential sCell getting rid of operation in the frequency identical with the operation frequency of the sCell selected；

Fig. 7 illustrates according to the operation based on the network node of cyclic policy of one embodiment of the disclosure；

Fig. 8 illustrates the operation of the network node according to one embodiment of the disclosure, comprises particular event；

Fig. 9 is the block diagram of the network node according to one embodiment of the disclosure；

Figure 10 is the block diagram of the wireless device according to one embodiment of the disclosure；And

Figure 11 is for configuring the block diagram of the radio access node of sCell to wireless device according to one embodiment of the disclosure.

Detailed description of the invention

Embodiments set forth below represents the necessary information enabling those skilled in the art to put into practice embodiment, and illustrates the optimal mode putting into practice embodiment.After described below according to the reading of appended accompanying drawing, it will be appreciated by those skilled in the art that the concept of the disclosure it will be recognized that the application of these concepts specifically not solved in this article.It should be understood that these concepts and application drop in the scope of disclosure and the accompanying claims book.

At this point, Fig. 2 illustrates and wherein performs the sCell cellular communications networks 14 selected according to one embodiment of the disclosure.It is to be noted, that in many embodiments described herein, cellular communications networks 14 is third generation partner program (3GPP) Long Term Evolution (LTE) or senior LTE cellular communication network, and therefore, sometimes use LTE or senior LTE term.But, concept disclosed herein can be applicable to any applicable wireless network (such as cellular communications networks) utilizing carrier aggregation and expectation sCell to select.

As illustrated, cellular communications networks 14 comprises base station 16(it is referred to as the node B (eNB) 16 of evolution in LTE term) and some long distance wireless datelines (RRH) 18-1 to 18-3(be commonly referred to collectively as RRH18 herein and be individually referred to as RRH18).RRH18 is the RRH of base station 16.In this example, the community of the Serving cell as the wireless device 22 being positioned at pCell20 overlay area is served in base station 16, and more specifically primary community (pCell) 20.As it is used herein, the overlay area of community (overlay area of such as pCell20) is by the geographic area of MPS process.According to an embodiment, the community of RRH18-1 to 18-3 is that sCell24-1 to 24-3(is commonly referred to collectively as sCell24 in this article and is individually referred to as sCell24) can be small-cell.As discussed below, the one or more Serving cell sCell24 being chosen and be configured to wireless device 22 in sCell24.Although it is to be noted, that macrocell 20 is pCell in this example, but macrocell 20 can be sCell in another example.Such as, using wireless device 22 exemplarily, small-cell 24-2 can be alternatively the pCell of wireless device 22, and macrocell 20 can be alternatively the sCell of wireless device 22.

Fig. 3 illustrates according to one embodiment of the disclosure for selecting one or more sCell24 of wireless device 22 operation of the network node to the sCell24 of wireless device 22 selection of configuration.Network node can be any applicable network node (such as base station 16, any applicable radio access network nodes or any applicable core network node (such as mobile management entity)).First, network node obtains potential sCell24 list (step 100) of wireless device 22.Potential sCell24 list can be obtained in several ways.In one embodiment, network node obtains and can be used for community (such as neighbor cell) list being configured to sCell24 and wireless device 22 ability.Network node is then based on can be used for being configured to the common factor of the ability of the community of sCell24 and wireless device 22 and obtains potential sCell24 list (that is, potential sCell24 list is to can be used in being configured to sCell24 and having the cell list of the one or more parameters (such as operational frequency bands or frequency) mating wireless device 22 ability (such as wireless device 22 operational frequency bands or frequency)).Network node can have many communities, but not all community is all it may be necessary to can use as sCell24.Further, although wireless device 22 increasingly supports more frequency, but the frequency that given wireless device 22 is not supported often is still suffered from.

After obtaining potential sCell24 list, network node can give potential sCell24 list weighting (step 102) alternatively.This weighting is for more likely selecting one or more sCell24 and/or being less likely to the one or more sCell24 of selection.Depending on implementing, this can use and is embodied in various ways.In one embodiment, comprise one or more repeated entries to potential sCell24 list weighting are added in potential sCell24 list.In another embodiment, comprise to before the blind sCell24 of selection potential sCell24 list weighting and adjust the select probability of one or more entries in potential sCell24 list.

It follows that network node sCell24(step 104 of blind selection wireless device 22 from potential sCell24 list)." blind selection " used herein is it is meant that select sCell24 and not necessarily have the sCell any instruction being adapted to act as the sCell24 of wireless device 22, for instance, it is not necessary to first obtain any signal quality measured, such as frequency interbed 3(L3) measure.By not requiring that the L3 that wireless device 22 carried out potential sCell24 before selecting potential sCell24 measures, can avoid measuring the needs in gap at wireless device 22.Measure gap to occur temporarily to hang one or more current connection (such as arriving the connection of pCell20) so that when the L3 carrying out potential sCell24 measures at wireless device 22.Use the inter-frequency measurements measuring gap execution sCell24 selection will cause 7-15% throughput loss (depending on the clearance mode of configuration) on the community of configuration.According to some embodiments, by blind selection sCell24, this throughput loss can be avoided, and also can avoid performing the such as L3 power consumption measuring necessary increase measured.

In one embodiment, blind selection sCell24 comprises and selects sCell24 from potential sCell24 list based on random selection strategy.In another embodiment, blind selection sCell24 comprises and selects sCell24 from potential sCell24 list based on cyclic policy.Cyclic policy used herein relates to order in order and selects sCell24.In certain embodiments, potential sCell24 list is classified by operation frequency.It addition, in one embodiment, in potential sCell24 list, the position in the list different from the position that the previous ones of cyclic policy stops starts the cycle over strategy.In one embodiment, in potential sCell24 list, the position in list after the position that the previous ones immediately preceding cyclic policy stops starts the cycle over strategy.It is also possible to the random site in potential sCell24 list starts the cycle over strategy.Using these modes, the sCell24 selected for wireless device 22 may differ from the sCell24 into other wireless device 22 selection, and network node can be avoided retrying and have been chosen by sCell24 recently.

Additionally, in certain embodiments, it may be achieved the random site in potential sCell24 list starts the cycle over strategy to avoid load imbalance problem.Load imbalance occurs when disproportionately selecting relatively little of sCell24 configuration not select other potential sCell24 for wireless device 22.In the most simple case, provide identical potential sCell24 list to each wireless device 22, and same position in lists starts each cyclic policy in potential sCell24 list.In this case, will be that suitable each wireless device 22 will configure that sCell24 for a sCell24 in its list.Therefore, it is the sCell24 of last will be very unlikely to be configured to the sCell24 of wireless device 22 in list.Thus, the load on different sCell24 is by unbalanced.In some cases, the service quality of the wireless device 22 of the sCell24 used that causes being configured to overusing is declined by this, and will work without the sCell24 to less use can resource.

After the sCell24 of blind selection wireless device 22, network node is to the sCell24(step 106 of wireless device 22 selection of configuration).In LTE, this configuration completes by sending suitable radio resource control (RRC) message to wireless device 22.After the sCell24 to wireless device 22 selection of configuration, network node determines the need for selecting new sCell24(step 108).More precisely, as before about step 104 discuss, the sCell24 owing to configuring is blind selection, and therefore it is not likely to be the acceptable sCell24 of wireless device 22.If as it is used herein, wireless device 22 cannot connect to sCell24, if or wireless device 22 indicate the signal quality from sCell24 insufficient, then sCell24 is not the acceptable sCell24 of wireless device 22.According to an embodiment, if network node determines that it should select new sCell24(step 108), then network node returns to step 104, and from potential sCell24 list the sCell24 of blind selection wireless device 22.Otherwise, network node terminates sCell24 selection course.

Fig. 4 illustrates according to one embodiment of the disclosure for selecting one or more sCell24 of wireless device 22 operation of the network node to the sCell24 of wireless device 22 selection of configuration.This embodiment is similar to the embodiment of Fig. 3, but in this embodiment, after the sCell24 to wireless device 22 selection of configuration, the adjacent sCell24 that network node receives, from wireless device 22, the sCell24 selected better indicates than the sCell24 selected.As discussed above, network node obtains potential sCell24 list (step 200) of wireless device 22, give potential sCell24 list weighting (step 202) alternatively, the sCell24(step 204 of blind selection wireless device 22 from potential sCell24 list), and give the sCell24(step 206 of wireless device selection of configuration).

After the sCell24 to wireless device 22 selection of configuration, the neighbor cell that network node receives, from wireless device 22, the sCell24 selected better indicates (step 208) than the sCell24 selected.In one embodiment, described instruction is the instruction of A4 event.In LTE specification, when the neighbor cell being the sCell24 selected in this example becomes better than threshold value, A4 event occurs, and this threshold value is being herein referred to as A4 threshold value.In another embodiment, described instruction is the instruction of A6 event.In LTE specification, when same frequency be in this example the neighbor cell of sCell24 selected become sCell24 that deviation ratio selects good time, A6 event occurs.This event is added in LTERel-10, exactly promotes carrier aggregation.

Depending on implementing, in response to the instruction from wireless device 22, network node cancels the sCell24 sCell24(step 210 as wireless device 22 of selection of configuration alternatively).In LTE, this configuration completes by sending suitable RRC information to wireless device 22.In this embodiment, better indicating than the sCell24 selected in response to receiving neighbor cell, network node configures the neighbor cell sCell24(step 212 as wireless device 22 to wireless device 22).This newly configured sCell24 should be at least the same with the sCell24 configured before good or better than it.It is to be noted, that before the configuration neighbor cell sCell24 as wireless device 22, network node can determine that whether neighbor cell meets one or more predefined criterion.Such as, network node can first confirm that neighbor cell can be used for being configured to sCell24 and the ability of one or more parameters coupling wireless device 22 of neighbor cell.This such as can be determined by whether neighbor cell carries out in the potential sCell24 list of wireless device 22.

Fig. 5 illustrates according to another embodiment of the disclosure for selecting one or more sCell24 of wireless device 22 operation of the network node to the sCell24 of wireless device 22 selection of configuration.This embodiment is similar to the embodiment of Fig. 3 and Fig. 4, but in this embodiment, after the sCell24 to wireless device 22 selection of configuration, network node receives the instruction that the sCell24 selected is not the acceptable sCell24 of wireless device 22.As discussed above, network node obtains potential sCell24 list (step 300) of wireless device 22, give potential sCell24 list weighting (step 302) alternatively, the sCell24(step 304 of blind selection wireless device 22 from potential sCell24 list), and give the sCell24(step 306 of wireless device selection of configuration).

SCell24 owing to configuring is blind selection, and therefore it is not likely to be the acceptable sCell24 of wireless device 22.If network node such as receives, from wireless device 22, the instruction (step 308) that the sCell24 selected is not the acceptable sCell24 of wireless device 22, then network node returns to step 304, and from potential sCell24 list the new sCell24 of blind selection wireless device 22.Otherwise, network node terminates sCell24 selection course.In one embodiment, the instruction of A2 event that not to be the instruction of acceptable sCell24 of wireless device 22 from the sCell24 of the selection of wireless device 22 be.In LTE specification, when Serving cell (it is the sCell24 selecting and configuring in this example) becomes more worse than threshold value, A2 event occurs, and this threshold value is being herein referred to as A2 threshold value.In another embodiment, be not the instruction of acceptable sCell24 of wireless device 22 from the sCell24 of the selection of wireless device 22 it is the instruction that wireless device 22 cannot connect to the sCell24 selected.

Fig. 6 illustrates according to another embodiment of the disclosure for selecting one or more sCell24 of wireless device 22 operation of the network node to the sCell24 of wireless device 22 selection of configuration.As discussed above, network node obtains potential sCell24 list (step 400) of wireless device 22, give potential sCell24 list weighting (step 402) alternatively, the sCell24(step 404 of blind selection wireless device 22 from potential sCell24 list), and give the sCell24(step 406 of wireless device selection of configuration).

After the sCell24 to wireless device 22 selection of configuration, network node such as receives, from wireless device 22, the instruction (step 408) that the sCell24 selected is not the acceptable sCell24 of wireless device 22.In one embodiment, the instruction of A2 event that not to be the instruction of acceptable sCell24 of wireless device 22 from the sCell24 of the selection of wireless device 22 be.In another embodiment, be not the instruction of acceptable sCell24 of wireless device 22 from the sCell24 of the selection of wireless device 22 it is the instruction that wireless device 22 cannot connect to the sCell24 selected.Network node monitors that the neighbor cell of the sCell24 of the selection from wireless device 22 better indicates (step 410) than the sCell24 selected, rather than selects immediately to the new sCell24 of wireless device 22 configuration.In one embodiment, the neighbor cell of the sCell24 of selection is than selecting sCell24 better to indicate the instruction being A4 event or A6 event.Network node is modified to the acceptable sCell24 of existence by the instruction of the instruction or A6 event that receive A4 event, and the sCell24 with configuration currently selected is unacceptable.

If the neighbor cell that network node receives, from wireless device 22, the sCell24 selected better indicates (step 412) than the sCell24 selected, then network node is to wireless device 22 configuration neighbor cell (step 414) more better than the sCell24 selected.It is to be noted, that in certain embodiments, network node can first determine that neighbor cell meets the one or more predefined criterion of the sCell24 serving as wireless device 22.Otherwise, if network node does not receive the instruction than the sCell24 selected better (such as in predefined time quantum) of the neighbor cell of the sCell24 of selection from wireless device 22, then network node can reason out the suitable sCell24 of the identical frequency of the operation frequency of the sCell24 being not operate in and currently select and configure.If this inference is not true, then network node better indicates from the current sCell24 selected and configure reception neighbor cell than the sCell24 selected.Then network node gets rid of the potential sCell24(step 416 operated in the frequency identical with the operation frequency of the sCell24 selected).

It follows that network node new sCell24(step 418 of blind selection wireless device 22 from the potential sCell24 list eliminating the potential sCell24 got rid of in step 416).As discussed above, reasoned out the acceptable sCell24 of the identical operation frequency of the operation frequency of the sCell24 not having and configure before due to network node, then this newly selected eliminates those sCell24.Depending on that how many sCell24 share this operation frequency, this is got rid of and can be likely to unacceptable sCell24 and reduce the time quantum found needed for acceptable sCell24 by not configuring these.After the new sCell24 of step 418 blind selection wireless device 22, network node configures the newly selected sCell24(step 420 to wireless device 22).Accordingly, in certain embodiments, process can continue, until chosen and be configured with acceptable sCell24.

Fig. 7 illustrates according to another embodiment of the disclosure for selecting one or more sCell24 of wireless device 22 operation of the network node to the sCell24 of wireless device 22 selection of configuration.This embodiment is similar to the embodiment of Fig. 6, but in the embodiment of Fig. 7, utilizes an embodiment of circulation selection scheme.

First, network node obtains potential sCell24 list, as discussed above (step 500).Network node presses the operation frequency of potential sCell24 to potential sCell24 list category, to provide result group of frequencies (step 502).Each group of frequencies comprises one or more sCell24 with same operation frequency and/or operational frequency bands.SCell24 in each group of frequencies can arrange in any suitable manner.Such as, if network node has the other information selecting order of priority about sCell24, then this information can be used for the sCell24 in each group of frequencies is sorted.

After to potential sCell24 list category, network node can give potential sCell24 list weighting (step 504) alternatively.This weighting is for more likely selecting one or more sCell24 and/or being less likely to the one or more sCell24 of selection.In one embodiment, this weighting can comprise the order of change group of frequencies, or changes the order of sCell24 in each group of frequencies.Weighting also can comprise to be added to one or more repeated entries in potential sCell24 list or any applicable method (depending on the realization of method).

It follows that network node is according to circulation selection scheme sCell24(step 506 of blind selection wireless device 22 from potential sCell24 list).In one embodiment, in potential sCell24 list from be used for selecting the position in the different list in position of the previous ones stopping of the circulation selection scheme of the previous sCell24 of wireless device 22 to start the cycle over selection scheme.In one embodiment, in potential sCell24 list, the position in the list after the position being used for selecting the previous ones of the cyclic policy of the previous sCell24 of wireless device 22 to stop starts the cycle over strategy.In one embodiment, the next position in the list that select is kept the index as potential sCell24 list.In this embodiment, after each blind selection, index can be changed to next sCell24 referred in potential sCell24 list.Diverse location starts to select to avoid the sCell24 selecting to be likely to recently have been selected as the sCell24 of wireless device 22 in lists.

In certain embodiments, it may be achieved the method for potential list weighting and blind next sCell24 of selection, with the problem avoiding load imbalance.Load imbalance is discussed in more detail above, and occurs when disproportionately selecting relatively little of potential sCell24 configuration not select other potential sCell24 for wireless device 22.Allow to choose, by increase, the problem that the probability of currently used less potential sCell24 avoids load imbalance compared with other potential sCell24 to potential sCell24 list weighting.Being used as reverse situation, wherein weighting reduces and chooses the probability of currently used more potential sCell24 compared with other potential sCell24.Only exist some modes that potential sCell24 list can be weighted.

In addition, it may be achieved choose next sCell24 and carry out the method for blind selection to avoid load imbalance problem.In one embodiment, if obtaining same or similar potential sCell24 list for more than one wireless device 22, then choose next sCell24 and carry out the method for blind selection and can choose random sCell24 from list.In this way, wireless device 22 will configure sCell24 in the way of more balanced.In the embodiment realizing circulation selection strategy, next sCell24 wherein wanting blind selection is next sCell24 in potential sCell24 list, and the starting point in potential sCell24 list can be different for different radio device 22.In this way, wireless device 22 will configure sCell24 in the way of more balanced.In another embodiment, the potential sCell24 list obtained for a wireless device 22 comprises the sCell24 of the order different by the order of the potential sCell24 in another the potential sCell24 list obtained from another wireless device 22.In this way, wireless device 22 will configure sCell24 in the way of more balanced.

After the sCell24 of blind selection wireless device 22, network node is to the sCell24(step 508 of wireless device 22 selection of configuration).In this embodiment, after the sCell24 to wireless device 22 selection of configuration, network node receives the instruction (step 510) that the sCell24 selected is not the acceptable sCell24 of wireless device 22.In one embodiment, the instruction of A2 event that not to be the instruction of acceptable sCell24 of wireless device 22 from the sCell24 of the selection of wireless device 22 be.In another embodiment, be not the instruction of acceptable sCell24 of wireless device 22 from the sCell24 of the selection of wireless device 22 it is the instruction that wireless device 22 cannot connect to sCell24.

Network node monitors that the neighbor cell of the sCell24 of the selection from wireless device 22 better indicates (step 512) than the sCell24 selected, rather than selects immediately to the new sCell24 of wireless device 22 configuration.In one embodiment, this instruction is instruction or the instruction of A6 event of A4 event.Network node is modified to by the instruction of the instruction or A6 event that receive A4 event exists sCell24 more acceptable than the sCell24 being currently configured.

If the neighbor cell that network node receives, from wireless device 22, the sCell24 selected better indicates (step 514) than the sCell24 selected, then network node is to wireless device 22 configuration neighbor cell (step 516) more better than the sCell24 selected.Otherwise, if network node does not receive the neighbor cell of the sCell24 of selection and better indicates (step 514) than the sCell24 selected from wireless device 22, then network node can reason out the suitable sCell24 of the identical frequency of the operation frequency of the sCell24 being not operate in and select.If this inference is not true, then network node received neighbor cell than select sCell24 better indicate.

Network node can get rid of the potential sCell24 operated with identical for the sCell24 operation frequency selected now.Owing to potential sCell24 list is classified by the operation frequency of potential sCell24 to provide group of frequencies, therefore can by selecting new sCell24 to realize getting rid of sCell24 from different frequency group.At this point, network node is from the new sCell24(step 518 of next group of frequencies blind selection wireless device 22).In the embodiment being maintained next sCell24 to select by the index of potential sCell24 list, index may proceed to the sCell24 in next group of frequencies in the potential sCell24 list of classification.

As discussed above, reasoned out the acceptable sCell24 of the identical operation frequency of the operation frequency of the sCell24 not having and configure before due to network node, then this is the newly selected is the sCell24 of the different operation frequency of the operation frequency of the sCell24 having from configuring before.After the sCell24 of selection wireless device 22 blind from different frequency group, network node configures the newly selected sCell24(step 520 to wireless device 22).In certain embodiments, this process continues in this way, until chosen and be configured with acceptable sCell24 for wireless device 22.

Fig. 8 illustrates according to another embodiment of the disclosure for selecting one or more sCell24 of wireless device 22 operation of the network node to the sCell24 of wireless device 22 selection of configuration.In this embodiment, the specific implementation of the many embodiments discussed before describing covering.In order to clear with for purpose of brevity, Fig. 8 contains the reference of particular measurement event (such as A1, A2, A4 and A6 measurement event).This is only the demonstration realization of an embodiment of the present disclosure.In other realizes, other measurement event or notice can be used.

First, network node obtains potential sCell24 list (step 600).After obtaining potential sCell24 list, network node can give potential sCell24 list weighting (step 602) alternatively.It follows that network node checks whether all candidate's sCell24(steps 604 eliminating in potential sCell24 list from consideration item).If eliminating all candidate sCell24 in potential sCell24 list from consideration item, then wireless device 22 is current in not having the acceptable sCell24 of wireless device 22 position covered.In order to avoid again configuring identical potential sCell24 when sCell24 can not can accept, network node waiting timer T1 expires (step 606).Intervalometer T1 is configured to predefined time quantum, and it can according to implementing change.In one embodiment, the value of intervalometer T1 is determined to be in sCell24 and selects and that power service condition during configuration attempt and having configures between the hope of the acceptable sCell24 of wireless device 22 is compromise.In one embodiment, the value of intervalometer T1 is determined based on the mobility of wireless device 22.Such as, the value of intervalometer T1 can with the mobility inversely related of wireless device 22, because wireless device 22 more moves, wireless device 22 will be got over possibly into the position with acceptable sCell24.After waiting timer T1 expires, network node desired locations in potential sCell24 list restarts sCell24 selection course (it potentially can according to step 602 weighting) (step 608).Network node can restart sCell selection course in any desired position from potential sCell24 list.Such as, network node previously can restart sCell selection course from the position starting sCell selection course before considering eliminate all sCell24 item in potential sCell24 list.

This point, no matter it is not yet from considering all candidate sCell24 eliminating in potential sCell24 list item from step 604() or step 608(restarts list) continue, network node is the sCell24(step 610 of blind selection wireless device 22 from potential sCell24 list all).As discussed above, in one embodiment, blind selection can according to circulation selection scheme.But, other blind selection scheme can be used, for instance randomly choose.After the sCell24 of blind selection wireless device 22, network node is to the sCell24(step 612 of wireless device 22 selection of configuration).

After the sCell24 to wireless device 22 selection of configuration, network node determines whether the instruction (step 614) receiving A2 event from wireless device 22.In LTE specification, when Serving cell (it is the sCell24 selecting and configuring in this example) becomes more worse than A2 threshold value, A2 event occurs.Receive the instruction of A2 event it is meant that select and configuration sCell24 is not the acceptable sCell24 of wireless device 22.On the contrary, if not receiving the instruction of A2 event, then mean an existence in two conditions, that is: the sCell24 with configuration that (1) selects is the acceptable sCell24 of wireless device 22, or (2) for a certain reason, network node not yet and will not receive the instruction of any event (A1, A2, A4 or A6) of the sCell24 with configuration of selection from wireless device 22.

In order to determine which condition in the two condition exists, if network node does not receive A2 event, then network node checks whether that any quality of the sCell24 receiving relevant selection from wireless device 22 indicates (step 616).In one embodiment, the instruction of this quality is the instruction of A1 event, the instruction of A4 event or the instruction of A6 event.In LTE specification, when the sCell24 selected becomes better than threshold value, A1 event occurs, and this threshold value is being herein referred to as A1 threshold value.

If network node does not receive A2 event, but really have received certain other quality instruction of sCell24 about selecting from wireless device 22, then the sCell24 selected is considered the acceptable sCell24 of wireless device 22.In the case, network node enters following circulation: wherein network node monitors that wireless device 22 is followed by becoming unacceptable or better neighbor cell with the sCell24 with configuration determining selection and is made available by.More precisely, in this embodiment, network node determines whether the instruction (step 618) receiving A4 or the A6 event of that select and configuration sCell24 from wireless device 22.Network node is modified to the neighbor cell that there is that better currently select and configuration sCell24 than current that select and configuration sCell24 by the instruction receiving A4 event or A6 event.

If not yet receiving the instruction of A4 event or A6 event, then network node determines whether the instruction (step 620) of the A2 event of sCell24 that is that be currently configured and that select from wireless device 22 reception.If having received the instruction of A2 event, then process returns to step 604, and repeats to select the new sCell24 of wireless device 22.It is noted that at this point, that select and configuration sCell24 can cancel configuration before.If not yet receiving the instruction of A2 event, then process returns to step 618.In step 618, if network node receives the instruction of A4 event or A6 event, then network node is to wireless device 22 configuration neighbor cell (step 622) more better than the sCell24 selected.In other words, neighbor cell is chosen and is configured to the new sCell24 of wireless device 22.In certain embodiments, that before select and configuration sCell24 can cancel configuration.From step 622, this process proceeds to step 620, and the newly selected and configuration the sCell24 for wireless device 22 performs.

Discussion referring back to step 614 and 616, in step 616, if network node receives the instruction of the A2 event of that select and configuration sCell24 really from wireless device 22, if or network node does not receive any quality about sCell24 from wireless device 22 and indicates, then network node starts intervalometer T2(step 624).In one embodiment, intervalometer T2 plan considers the more information of the sCell24 about the configuration received from wireless device 22.The same with the intervalometer T1 described before, the persistent period of intervalometer T2 can be realize specifically.The value of intervalometer T2 is more big, and the time with the unacceptable sCell24 wireless device 22 configured of leaving is more long.By contrast, the smaller value of intervalometer T2 can make network node miss the one or more additional measurement report with the sCell24 configured of the relevant selection that wireless device 22 is likely to send.Equilibrium between the two factor will be realize specific, and can be depending on the network architecture, the ability of wireless device or any other factors.

When intervalometer T2 is currently running and before intervalometer T2 expires, network node determines whether the instruction (step 626) of A4 event or the A6 event receiving that select and configuration sCell24 from wireless device 22.If network node receives the instruction of A4 event or A6 event, then network node is to wireless device 22 configuration neighbor cell (step 622) more better than the sCell24 selected.Otherwise, network node determines whether the instruction (step 628) of the A1 event of sCell24 that is that receive current selection from wireless device 22 and that configure.Receiving the instruction instruction of A1 event, sCell24 is the acceptable sCell24 of wireless device 22 now.If network node receives the instruction of A1 event really, then network node sCell24 is considered as being acceptable now, and process proceeds to step 620.

If not receiving measurement report in step 626 and 628, then network node determines whether intervalometer T2 has expired (step 630).If intervalometer T2 not yet expires, then this process returns to step 626 so that repeat step 626 and 628 to continue to monitor A4 or A6 event or A1 event.Once intervalometer T2 expires, network node is it is determined whether receive A2 event, but does not receive A6 event (step 632).If receiving A2 event but not receiving A6 event, then network node can be reasoned out, it does not have operates at the suitable sCell24 with the sCell24 same operation frequency of current that select and configuration.If this inference is not true, then should there is neighbor cell and better indicate than the sCell24 selected.Thus, if receiving the instruction of A2 event but not receiving the instruction of A6 event, then network node eliminates the potential sCell24 operated in the frequency identical with the operation frequency of the sCell24 selected.Undertaken by the operation frequency of sCell24 in some embodiments classified (such as in the embodiment of circulation selection strategy) in potential sCell24 list, eliminate to operate and can relate to be advanced in list by selection course at the potential sCell24 of the frequency identical with the operation frequency of the sCell24 selected and operate at the sCell24 of the different frequency point being positioned at.

No matter whether network node jumps to next frequency in potential sCell24 list, and this process all returns to step 604, checks whether all candidate sCell24 eliminating in potential sCell24 list from consideration item at this network node.This process continues in this way.

Fig. 9 is radio access node 26(such as base station 16 according to one embodiment of the disclosure) block diagram.As illustrated, radio access node 26 comprises the Base Band Unit 28 including processing subsystem 30, memorizer 32 and network interface 34 and comprises the radio unit 36 of the transceiver 38 being coupled to one or more antenna 40.Transceiver 38 generally comprises for not shown to wireless device 22() wireless transmission data therefrom receive the simulated assembly of data, also have digital assembly in certain embodiments.From the angle of wireless communication protocol, namely transceiver 38 achieves at least some of layer 1(, physical layer or " PHY " layer).

Processing subsystem 30 whole realization any remainder of the unconsummated layer of transceiver 38 1, and higher (such as layer 2(data link layer), layer 3(Internet in wireless communication protocol) etc.) function.In a particular embodiment, processing subsystem 30 such as can include using the software being suitable for and/or firmware programs to perform one or several universal or special microprocessor some or all of functional or other microcontroller of base station 16 described herein.In addition or alternatively, processing subsystem 30 can include some or all of functional various digital hardware block (such as one or more special ICs (ASIC), one or more ready-made numeral and analog hardware assembly or their combination) of being configured to perform base station 16 described herein.In addition, in a particular embodiment, the functional of radio access node 26 described above can be realized by processing subsystem 30 in whole or in part, and processing subsystem 30 performs the software or other instruction that are stored in non-transitory computer-readable medium (such as the data storage component of such as memorizer 32 or other applicable type any).

Figure 10 is the block diagram of the wireless device 22 according to one embodiment of the disclosure.As illustrated, wireless device 22 comprises and includes being connected to the radio subsystem 42 of the transceiver 44 of one or more antenna 46, processing subsystem 48 and memorizer 50.Transceiver 44 generally comprises for illustrating to base station 16 and RRH18(Fig. 2) transmitting wireless messages and therefrom receive the simulated assembly of message, also have digital assembly in certain embodiments.From the angle of wireless communication protocol, namely transceiver 44 achieves at least some of layer 1(, physical layer or " PHY " layer).

Processing subsystem 48 whole realization any remainder of the unconsummated layer of radio subsystem 42 1, and higher (such as layer 2(data link layer), layer 3(Internet in wireless communication protocol) etc.) function.In a particular embodiment, processing subsystem 48 such as can include with being suitable for software and/or firmware programs to perform one or several universal or special microprocessor some or all of functional or other microcontroller of wireless device 22 described herein.In addition or alternatively, processing subsystem 48 can include being configured to perform some or all of functional various digital hardware block of wireless device 22 described herein (such as, one or more ASIC, one or more ready-made numeral and analog hardware assembly, or their combination).In addition, in a particular embodiment, the functional of wireless device 22 described above can be realized by processing subsystem 48 in whole or in part, and processing subsystem 48 performs the software or other instruction that are stored in non-transitory computer-readable medium (such as the data storage component of memorizer 50 or other applicable type any).

Figure 11 is for not shown to wireless device 22(according to one embodiment of the disclosure) sCell(is not shown in configuration) the block diagram of radio access node 26.As illustrated, radio access node 26 comprises list and obtains module 52, blind selection module 54 and configuration module 56, they respectively realize with software, and software, when being performed by the processor of radio access node 26, makes radio access node 26 operate according to any one embodiment described herein.List obtains module 52 and operates to provide the functional of radio access node 26 relative to steps described above 100,200,300,400,500 or 600.Equally, blind selection module 54 operates to provide the functional of radio access node 26 relative to steps described above 104,204,304,404,418,506,518 or 610.Configuration module 56 operates to provide the functional of radio access node 26 relative to steps described above 106,206,210,212,306,406,414,420,508,516,520,612 or 620.

In one embodiment, according to any one embodiment described herein, computer program comprises instruction, and described instruction makes the functional of the radio access node 26 that at least one processor performs when executed by least one processor.In one embodiment, it is provided that containing the carrier of above-mentioned computer program.Carrier is in electronic signal, optical signalling, radio signal or computer-readable recording medium (such as non-transitory computer-readable medium, the memorizer 32 that such as figure 9 illustrates).

Although embodiment described herein and providing many merits, but in some example implementation, at least some of which embodiment provides the advantage of the sCell24 configuring blind selection to wireless device 22, eliminates the needs measuring gap for handling capacity can be caused to lack.But, it is pointed out that this advantage is an example, and is not intended to limit embodiment disclosed herein scope.

Disclose at this and use following acronym in the whole text.

3GPP third generation partner program

ASIC special IC

CC component carrier

The node B of eNB evolution

L3 frequency interbed 3

LTE Long Term Evolution

LTERel-8 Long Term Evolution release 8

LTERel-10 Long Term Evolution release 10

MHz megahertz

PCC primary component carrier

PCell primary community

RRC radio resource controls

RRH long distance wireless dateline

RSRP Reference Signal Received Power

SCC level component carrier

SCell Ci Ji community.

It would be recognized by those skilled in the art that the improvement to disclosure preferred embodiment and amendment.All this type of improves and amendment is considered in the scope of concept disclosed herein and following claims.

Claims

1. the method operating network node, including:

Obtain the list of the potential secondary community (24) of wireless device (22)；

The secondary community of the described wireless device of blind selection (22) from the described list of potential secondary community (24)；And

Secondary community to described wireless device (22) selection of configuration.

2. the method for claim 1, wherein the described secondary community of blind selection includes selecting described secondary community from the described list of potential secondary community (24) based on cyclic policy.

3. method as claimed in claim 2, wherein selects described secondary community to include based on described cyclic policy: the position in the described list of the potential secondary community (24) different from the position of the previous ones stopping being used for selecting the described cyclic policy of previously secondary community starts described cyclic policy in the described list of potential secondary community (24) from the described list of potential secondary community (24).

4. method as claimed in claim 2, wherein selects described secondary community to include based on described cyclic policy: the position in the described list of the potential secondary community (24) after the position being used for selecting the previous ones of the previously described cyclic policy of secondary community to stop starts described cyclic policy in the described list of potential secondary community (24) from the described list of potential secondary community (24).

5. the method for claim 1, wherein the described secondary community of blind selection includes selecting described secondary community from the described list of potential secondary community (24) based on random selection strategy.

6. the method for claim 1, farther includes:

Better indicate from the neighbor cell of the secondary community that described wireless device (22) receives described selection than the secondary community of described selection；And

In response to receiving described instruction, configure the secondary community as described wireless device (22), the described neighbor cell to described wireless device (22).

7. method as claimed in claim 6, farther includes: cancel the secondary community configuring described selection as the secondary community of described wireless device (22).

8. method as claimed in claim 6, wherein said instruction is the instruction of A4 event.

9. method as claimed in claim 6, wherein said instruction is the instruction of A6 event.

10. the method for claim 1, farther includes:

After configure the secondary community of described selection to described wireless device (12), it not the instruction of the acceptable secondary community of described wireless device (22) from the secondary community of the described wireless device described selection of reception, and

As response:

The new secondary community of the described wireless device of blind selection (22) from the described list of the potential secondary community (24) of described wireless device (22)；And

The described new secondary community of described wireless device (22) it is used for described wireless device (22) selection of configuration.

11. method as claimed in claim 10, farther include: cancel the secondary community configuring described selection as the secondary community of described wireless device (22).

12. method as claimed in claim 10, wherein said instruction is the instruction of A2 event.

13. the method for claim 1, farther include:

After configure the secondary community of described selection to described wireless device (22), receive, from described wireless device (22), the instruction that the secondary community of described selection is not the acceptable secondary community of described wireless device (22), and as response:

Monitor that the neighbor cell from the secondary community of the described selection of described wireless device (22) better indicates than the secondary community of described selection；

If not receiving the described neighbor cell described instruction more better than the secondary community of described selection of secondary community of described selection within the period of definition, then from the described list of the potential secondary community (24) of described wireless device (22) the new secondary community of the described wireless device of blind selection (22) and get rid of and operate the potential secondary community in the frequency identical with the operation frequency of the secondary community of described selection；And

14. method as claimed in claim 13, wherein receive, from described wireless device (22), the instruction of acceptable secondary community that the secondary community of described selection is not described wireless device (22) and include receiving from described wireless device the instruction of A2 event, and monitor that the neighbor cell of the secondary community of the described selection from described wireless device (22) better indicates than the secondary community of described selection and include monitoring the instruction selected from the group being made up of the instruction of A4 event and the instruction of A6 event.

15. the method for claim 1, wherein the described list of potential secondary community (24) is classified by the operation frequency of described potential secondary community, thus to provide multiple group of frequencies in described list, the described secondary community of blind selection includes according to the described secondary community of cyclic policy blind selection from a group of frequencies, and described method farther includes:

After configure the secondary community of described selection to described wireless device (12), receive, from described wireless device (22), the instruction that the secondary community of described selection is not the acceptable secondary community of described wireless device (22), and

As response:

If not receiving the described neighbor cell described instruction more better than the secondary community of described selection of secondary community of described selection within the period of definition, then according to the new secondary community selecting described wireless device (22) in next group of frequencies from the described list of potential secondary community (24) of described cyclic policy；And

16. the method for claim 1, farther include:

After configure the secondary community of described selection to described wireless device (22), monitor at least one instruction selected from the group being made up of following item from described wireless device (22):

The secondary community of described selection is the instruction of the acceptable secondary community of described wireless device (22)；

The secondary community of described selection is not the instruction of the acceptable secondary community of described wireless device (22)；And

Neighbor cell from the secondary community of the described selection of described wireless device (22) better indicates than the secondary community of described selection；

If not receiving at least one instruction within the period of definition, then the new secondary community of the described wireless device of blind selection (22) from the described list of the potential secondary community (24) of described wireless device (22)；And

17. the method for claim 1, wherein obtain the described list of potential secondary community (24) and include the common factor of the ability based on the community and described wireless device (22) that can be used for being configured to secondary community and determine described list.

18. method as claimed in claim 17, wherein determine that described list includes based on the common factor that can be used for being configured to the ability of the community of secondary community and described wireless device (22): the common factor based on the frequency capabilities of the operation frequency and described wireless device (22) that can be used for being configured to the described community of secondary community determines described list.

19. the method for claim 1, the described list of the potential secondary community (24) of wherein said wireless device (22) includes the potential secondary community by the order different from the order of the potential secondary community included in the second list of the potential secondary community (24) of second wireless device (22).

20. the method for claim 1, farther include: to the described list weighting of potential secondary community (24) before the described secondary community of blind selection.

21. method as claimed in claim 20, wherein included to the described list weighting of potential secondary community (24) before the described secondary community of blind selection: one or more repeated entries to be added in the described list of potential secondary community (24).

22. method as claimed in claim 20, wherein included to the described list weighting of potential secondary community (24) before the described secondary community of blind selection: to adjust the probability selecting one or more entry in the described list of potential secondary community (24).

23. the method for claim 1, wherein said network node includes radio network node.

24. method as claimed in claim 23, wherein said radio network node includes base station (16).

25. for the network node to the secondary community of wireless device (22) configuration, including processor (30) and memorizer (32), described memorizer (32) contains by described processor (30) executable instruction, thus described network node operation with:

Obtain the list of the potential secondary community (24) of described wireless device (22)；